Exercise Prescription for Heart Failure: The New Paradigm

For much of the 20th century, patients with heart failure were advised to rest. Exercise was considered dangerous — capable of precipitating decompensation or sudden death. The HF-ACTION trial changed everything in 2009, demonstrating that aerobic exercise was safe and improved quality of life in stable HFrEF patients.

Multiple meta-analyses confirm that exercise training in heart failure reduces hospitalizations by approximately 28% and improves peak VO₂ by 1–3 mL/kg/min. The mechanisms include improved skeletal muscle oxidative capacity, autonomic nervous system rebalancing, and peripheral vascular adaptations.